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| Term | Meaning |
| depth | the distance from top to bottom |
| average | the usual amount or kind |
| tides | the regular rise and fall of the ocean's water |
| peak | the pointed top of a mountain or hill |
| deserts | dry and usually sandy areas of land without trees |
| waterfalls | natural streams of water falling from a high place |
| outrun | to run or move faster than someone or something |